Virtual Reality (VR) is a computer-generated environment which can be used
to simulated different real situation. With the help of the special
equipment such as Head-mounted Display (HMD) and cybergloves, VR system
users could have an immersive feeling as if they were really in the
Virtual Environment (VE). They can even interact with the virtual
objects. This technology has already been applied in various areas. E.g.
pilots training and entertainment.